PAPER COATING PIGMENTS

A coating composition for use in producing a coating on paper and other substrates comprises an aqueous suspension of a particulate pigment together with a binder, wherein the particulate pigment comprises a mixture of: a first pigment component comprising particulate ground calcium carbonate (GCC)...

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Bibliographische Detailangaben
Hauptverfasser:	THRALE, DEB, IYER, RAJAN, R, NUTBEEM, CHRISTOPHER, PANFIL, DANIEL, J, MORTIMER, MARK, SKUSE, DAVID
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMISTRY DYES IMPREGNATING OR COATING OF PAPER INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING POLISHES PREPARATION OF CARBON BLACK PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	A coating composition for use in producing a coating on paper and other substrates comprises an aqueous suspension of a particulate pigment together with a binder, wherein the particulate pigment comprises a mixture of: a first pigment component comprising particulate ground calcium carbonate (GCC) having a particle size distribution (psd) steepness factor ranging from about (30) to about (45); and a second pigment component comprising either particulate precipitated calcium carbonate (PCC) having a psd steepness factor ranging from about (55) to about (75), or particulate GCC having a psd steepness factor ranging about (40) to about (55). The particulate pigment may optionally further include a particulate kaolin clay. L'invention concerne une composition d'enduit, destinée à enduire du papier et d'autres substrats, comprenant une suspension aqueuse d'un colorant particulaire ainsi qu'un liant, dans laquelle le colorant particulaire contient un mélange d'un premier composant de colorant comportant du carbonate de calcium moulu particulaire (GCC) possédant une granulométrie (psd) s'étendant environ de 30 à environ 45, et un deuxième composant de colorant contenant soit du carbonate de calcium précipité particulaire (PCC) ayant un facteur d'inclinaison (psd) allant d'environ de 55 à environ 75, soit un GCC particulaire ayant un facteur d'inclinaison psd s'étendant environ de 40 à environ 55. Le colorant particulaire peut sur option comprendre un argile particulaire de kaolin.